A5014567426- Groundwater and Isotope Geochemistry
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Groundwater and Watershed Analysis
- Peatlands and Wetlands Ecology
- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Water Quality and Pollution Assessment
- Mine drainage and remediation techniques
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Aquatic Invertebrate Ecology and Behavior
- Water resources management and optimization
- Hydrocarbon exploration and reservoir analysis
- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Soil Carbon and Nitrogen Dynamics
- Geophysical and Geoelectrical Methods
- Geophysical Methods and Applications
- Ecology and biodiversity studies
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Integrated Water Resources Management
- Geological and Geophysical Studies
Commonwealth Scientific and Industrial Research Organisation
2005-2024
ACT Government
2014-2024
CSIRO Land and Water
2009-2021
National Centre for Groundwater Research and Training
2012-2015
Flinders University
2012-2015
Australian Federal Police
2014
Norsk Hydro (Germany)
2014
American Public Health Association
2014
Institut des Sciences Moléculaires
2005-2008
University of Waterloo
1998-2000
Water quality was monitored in Boreal Shield lakes for 3 years following their simultaneous impact by clearcut logging or wildfire. Seventeen similar undisturbed served as references. Dissolved organic carbon (DOC) and the light attenuation coefficient (ε PAR ) were up to threefold higher cut than reference burnt lakes. Compared with median values lakes, had concentrations of total phosphorus (TP) (two- three-fold), nitrogen (TON) (twofold), K + , Cl - Ca 2+ (up sixfold). NO SO 4 2- 60-...
Groundwater discharge to the Cockburn River, southeast Australia, has been estimated from comparison of natural 222 Rn activities in groundwater and river water, interpreted using a numerical flow model that simulates longitudinal radon as function inflow, hyporheic exchange, evaporation, gas exchange with atmosphere, radioactive decay. An injection SF 6 into estimate transfer velocity assisted constraining model. Previous estimates inflow have not considered possible input due between water...
Abstract Terrestrial groundwater travels through subterranean estuaries before reaching the sea. Groundwater‐derived nutrients drive coastal water quality, primary production, and eutrophication. We determined how dissolved inorganic nitrogen (DIN), phosphorus (DIP), organic (DON) are transformed within estimated submarine discharge (SGD) nutrient loads compiling > 10,000 samples from 216 sites worldwide. Nutrients exhibited complex, nonconservative behavior in estuaries. Fresh DIN DIP...
Abstract In semi‐arid and arid river basins, understanding the connectivity between rivers alluvial aquifers is one of key challenges for management groundwater resources. The type connection present (gaining, losing‐connected, transitional losing‐disconnected) was assessed at 12 sites along six Murray–Darling Basin reaches. assessments were made by measuring hydraulic head in riparian zone near to evaluate if water tables intersected riverbeds fluid pressure (ψ) riverbeds. rationale latter...
The evaluation of the water footprint goods is a good step towards circularity water. assessment whole life cycle product allows quantification its actual consumption – including direct and indirect usage as well devalued through contamination. circular economy seeks to use resources within loops that allow their conservation. allocation can be subdivided into blue (groundwater surface water), green (rain water) grey (contaminated but it must also integrate differentiate in closed or...
Element export rates from the drainage area of nine harvested, burnt, and 16 reference Boreal Shield lake basins in Haute-Mauricie, Quebec, were estimated for 3 years following harvesting or fires. Export evaluated using sampling surveys, hydrological budgets, esti - mated nutrient retention during transit. Increases K + , total N, P similar between har- vested burnt areas. However, harvested areas exported more dissolved organic C, while Mg 2+ ,N O SO4 2- . Potassium cumulative losses...
Flow regulation and water diversion for irrigation have considerably impacted the exchange of surface between Murray River its floodplains. However, way in which river has groundwater–surface interactions is not completely understood, especially regards to salinization accompanying vegetation dieback currently occurring many Groundwater–surface were studied over a 2 year period riparian area large floodplain (Hattah–Kulkyne, Victoria) using combination piezometric monitoring environmental...
Within Australia and globally there is considerable concern about the potential impacts of groundwater extraction on ecosystems dependent groundwater. In this study we have combined heat pulse isotopic techniques to assess use by riparian vegetation along Daly River in Northern Territory. The forests exhibited structural floristic complexity. More than 40 tree species were recorded during surveys these a range leaf phonologies, implying complex patterns water resource partitioning within...
Rivers are often assumed to be the main source of nutrients triggering eutrophication in Great Barrier Reef (GBR). However, existing nutrient budgets suggest a major missing nitrogen and phosphorus sustaining primary production. Here, we used radium isotopes resolve submarine groundwater discharge (SGD)-derived, shelf-scale inputs GBR. The total SGD was ∼10-15 times greater than average river inputs, with nearshore accounting for ∼30% this. Total accounted >30% all known dissolved inorganic...
Element export rates from the drainage area of nine harvested, burnt, and 16 reference Boreal Shield lake basins in Haute-Mauricie, Québec, were estimated for 3 years following harvesting or fires. Export evaluated using sampling surveys, hydrological budgets, nutrient retention during transit. Increases K + , total N, P similar between harvested burnt areas. However, areas exported more dissolved organic C, while Mg 2+ NO - SO 4 2- . Potassium cumulative losses runoff study a magnitude as...
Radon‐222 is a naturally occurring radioactive gas (half‐life = 3.8 d) that emitted by virtually all geologic materials. Stream sediment porewater tends to approach an equilibrium 222 Rn activity determined the production rate of sediments and radon half‐life. However, this may not be reached when porewaters are diluted with low surface waters hyporheic exchange. Thus, water residence time ( t h ) can estimated in situ based on difference measured relative absence To validate Rn‐derived...
We examined sources of water and daily seasonal use patterns in two riparian tree species occupying contrasting niches within zones throughout the wet–dry tropics northern Australia: Corymbia bella Hill Johnson is found along top levee banks Melaleuca argentea W. Fitzg. restricted to riversides. Patterns (sap flow) leaf potential were four trees each at three locations Daly River Northern Territory. Predawn was higher than –0.5 MPa dry season both species, but lower end beginning season....
We present detailed profiles of vertical water flux from the surface to 1.2 m beneath Haughton River in tropical northeast Australia. A 1-D numerical model is used estimate based on raw temperature time series observations within downwelling, upwelling, neutral, and convergent sections hyporheic zone. Monte Carlo analysis derive error bounds for fluxes measurement uncertainty effective thermal diffusivity. Vertical ranged 5.7 d−1 (downward) −0.2 (upward) with lowest relative errors values...
Abstract Chloride (Cl − ), stable isotope ratios of water (δ 18 O and δ 2 H), sulfur hexafluoride (SF 6 tritium ( 3 carbon‐14 14 C), noble gases 4 He, Ne, Ar), hydrometry were used to characterize groundwater‐surface interactions, in particular infiltration rates, for the Lower Namoi River (New South Wales, Australia). The study period (four sampling campaigns between November 2009 2011) represented end a decade‐long drought followed by several high‐flow events. showed that river was...
We used subfossil Chaoborus mandibles preserved in sediments of Cabin, Caledonia, and Celestine lakes, Alberta, to determine whether fish were present the lakes (which now contain rainbow trout (Oncorhynchus mykiss) lake chub (Couesius plumbeus)) prior first stockings early this century. tested good indicators presence montane a survey 43 jasper Banff national parks. americanus was only species inhabiting fishless also found three with low density (co-occurring C. flavicans two lakes). Other...